Terahertz emission from metal nanoparticles due to ultrafast heating
Optics
2017-12-22 v1 Applied Physics
Abstract
We demonstrate theoretically that ultrafast heating of metal nanoparticles by the laser pulse should lead to the generation of coherent terahertz (THz) radiation during the heat redistribution process. It is shown that after the femtosecond laser pulse action the time-dependent gradient of the electronic temperature induces low-frequency particle polarization with the characteristic timescale of about fractions of picosecond. In the case of the directed metallic pattern, the THz pulse waveform can be controlled by changing geometry of the individual particle. The generation mechanism proposed in this Letter can be used for interpretation of the recent experiments on the THz generation from metallic nanoparticles and nanostructures.
Keywords
Cite
@article{arxiv.1712.07907,
title = {Terahertz emission from metal nanoparticles due to ultrafast heating},
author = {Daniil Fadeev and Ivan Oladyshkin and Vyacheslav Mironov},
journal= {arXiv preprint arXiv:1712.07907},
year = {2017}
}